Operation Manual
16
A7 TIG Orbital System 300© Kemppi Oy 2016 1615
OPERATING MANUAL
2.7 Electrode
Almost all welding can be done with the tungsten electrode
ground to a 30° included angle. The tungsten electrode
should have a 0.15 mm at to avoid tungsten "spitting".
The greater the included angle of the tungsten, the greater
the penetration capability. Changing the included angle
also aects weld bead width. Oscillation width needs to
be changed accordingly. See recommended tungsten
electrode geometry.
If tungsten electrode is sharpened at both ends, you
can change direction after one end has worn o.
0.1 mm
0.15 mm
30° inc. both ends
38 mm
To select a suitable electrode for the welding application
and a suitable collet for the electrode:
1. Insert the electrode through the collet and collet
body.
2. Screw the body into the torch with the large end of
collet upwards.
3. Ensure that the electrode extends to correct length
without ceramic gas nozzle touching the pipe
surface.
4. Tighten collet body with torch back-cap (minimal
torque).
5. Use the adjustment screws to set the correct torch
angle and position.
For most applications, the torch centreline should pass
through the centre line of the pipe.
Replace the torch back cap with a back cap plug for
minimal radial clearance:
1. When you use the back cap plug, use collet wrench
(supplied in the tool kit) to clamp the tungsten
electrode in the torch.
2. Engage the "ats" of the collet around the "ats"
of the collet body and rotate. Do not use excessive
force.
3. Install the gas cup.